import 'package:flutter_test/flutter_test.dart';
import 'package:awak/common/models/topic.dart';
import 'package:awak/common/models/content.dart';
import 'package:awak/common/models/review.dart';

void main() {
  group('UI Improvements Tests', () {
    late List<Topic> testTopics;
    late List<Content> testContents;
    late List<Review> testReviews;

    setUp(() {
      // 创建测试主题
      testTopics = [
        Topic(
          id: 1,
          title: 'Short Title',
          label: 'Short',
          content: 'Short topic content',
          coverImage: 'short.jpg',
          numberPeople: 100,
          userId: 1,
        ),
        Topic(
          id: 2,
          title: 'This is a Very Long Topic Title That Should Wrap to Multiple Lines When Displayed in the Detail Topic Page UI',
          label: 'Long Title',
          content: 'Long topic content for testing text wrapping functionality',
          coverImage: 'long.jpg',
          numberPeople: 150,
          userId: 2,
        ),
        Topic(
          id: 3,
          title: 'Medium Length Topic Title for Testing',
          label: 'Medium',
          content: 'Medium topic content',
          coverImage: 'medium.jpg',
          numberPeople: 75,
          userId: 3,
        ),
      ];

      // 创建测试内容
      testContents = [
        Content(
          id: 1,
          picture: 'content1.jpg',
          description: 'First content with many reviews',
          userId: 1,
          topicId: 1,
          publishedAt: DateTime.now().subtract(Duration(hours: 1)),
        ),
        Content(
          id: 2,
          picture: 'content2.jpg',
          description: 'Second content with few reviews',
          userId: 2,
          topicId: 2,
          publishedAt: DateTime.now().subtract(Duration(hours: 2)),
        ),
        Content(
          id: 3,
          picture: 'content3.jpg',
          description: 'Third content with no reviews',
          userId: 3,
          topicId: 3,
          publishedAt: DateTime.now().subtract(Duration(hours: 3)),
        ),
      ];

      // 创建测试评论
      testReviews = [
        // content1 有 5 条评论
        Review(id: 1, content: 'Great content!', userId: 2, contentId: 1),
        Review(id: 2, content: 'Very insightful', userId: 3, contentId: 1),
        Review(id: 3, content: 'Thanks for sharing', userId: 4, contentId: 1),
        Review(id: 4, content: 'Interesting perspective', userId: 5, contentId: 1),
        Review(id: 5, content: 'Well written', userId: 1, contentId: 1),
        
        // content2 有 2 条评论
        Review(id: 6, content: 'Nice post', userId: 1, contentId: 2),
        Review(id: 7, content: 'Good point', userId: 3, contentId: 2),
        
        // content3 有 0 条评论
      ];
    });

    test('should handle topic title text wrapping requirements', () {
      // 验证长标题的特征
      final longTitleTopic = testTopics[1];
      
      expect(longTitleTopic.title.length, greaterThan(50));
      expect(longTitleTopic.title.split(' ').length, greaterThan(10));
      
      // 验证标题包含多个单词，适合换行
      final words = longTitleTopic.title.split(' ');
      expect(words.length, greaterThanOrEqualTo(10));
      
      // 验证标题没有特殊字符会影响换行
      expect(longTitleTopic.title, isNot(contains('\n')));
      expect(longTitleTopic.title, isNot(contains('\t')));
      
      // 验证标题是连续的文本，适合自动换行
      expect(longTitleTopic.title.trim(), longTitleTopic.title);
      
      // 验证长标题的完整内容
      expect(longTitleTopic.title, 'This is a Very Long Topic Title That Should Wrap to Multiple Lines When Displayed in the Detail Topic Page UI');
    });

    test('should calculate review counts correctly for content', () {
      // 计算每个content的评论数量
      final reviewCounts = <int, int>{};
      for (final review in testReviews) {
        reviewCounts[review.contentId] = (reviewCounts[review.contentId] ?? 0) + 1;
      }
      
      // 验证评论数量计算正确
      expect(reviewCounts[1], 5); // content1 有5条评论
      expect(reviewCounts[2], 2); // content2 有2条评论
      expect(reviewCounts[3] ?? 0, 0); // content3 有0条评论
      
      // 验证总评论数
      final totalReviews = reviewCounts.values.fold(0, (sum, count) => sum + count);
      expect(totalReviews, testReviews.length);
    });

    test('should support different title lengths for text wrapping', () {
      // 测试不同长度的标题
      final shortTitle = testTopics[0].title;
      final longTitle = testTopics[1].title;
      final mediumTitle = testTopics[2].title;
      
      // 验证短标题
      expect(shortTitle.length, lessThan(20));
      expect(shortTitle.split(' ').length, lessThan(5));
      
      // 验证长标题
      expect(longTitle.length, greaterThan(80));
      expect(longTitle.split(' ').length, greaterThan(15));
      
      // 验证中等长度标题
      expect(mediumTitle.length, allOf(greaterThan(20), lessThan(80)));
      expect(mediumTitle.split(' ').length, allOf(greaterThan(4), lessThan(15)));
    });

    test('should handle zero review count display', () {
      // 测试零评论数量的显示
      final contentWithNoReviews = testContents[2]; // content3
      final reviewCount = testReviews.where((r) => r.contentId == contentWithNoReviews.id).length;
      
      expect(reviewCount, 0);
      expect('$reviewCount', '0'); // 验证显示为字符串"0"
    });

    test('should handle various review count ranges', () {
      // 测试不同范围的评论数量
      final reviewCounts = <int, int>{};
      for (final review in testReviews) {
        reviewCounts[review.contentId] = (reviewCounts[review.contentId] ?? 0) + 1;
      }
      
      // 验证不同数量级的评论数
      expect(reviewCounts[1], 5); // 单位数
      expect(reviewCounts[2], 2); // 单位数
      expect(reviewCounts[3] ?? 0, 0); // 零
      
      // 验证数字转字符串的显示
      expect('${reviewCounts[1]}', '5');
      expect('${reviewCounts[2]}', '2');
      expect('${reviewCounts[3] ?? 0}', '0');
    });

    test('should maintain content-review relationship integrity', () {
      // 验证内容和评论的关系完整性
      for (final review in testReviews) {
        final content = testContents.where((c) => c.id == review.contentId).firstOrNull;
        expect(content, isNotNull, reason: 'Review should have corresponding content');
      }
      
      // 验证每个内容的评论数量统计
      for (final content in testContents) {
        final contentReviews = testReviews.where((r) => r.contentId == content.id).toList();
        expect(contentReviews.every((r) => r.contentId == content.id), true);
      }
    });

    test('should support review count caching mechanism', () {
      // 模拟评论数量缓存机制
      final Map<int, int> reviewCountCache = {};
      
      // 计算并缓存评论数量
      for (final content in testContents) {
        final count = testReviews.where((r) => r.contentId == content.id).length;
        reviewCountCache[content.id!] = count;
      }
      
      // 验证缓存数据
      expect(reviewCountCache[1], 5);
      expect(reviewCountCache[2], 2);
      expect(reviewCountCache[3], 0);
      
      // 验证缓存完整性
      expect(reviewCountCache.length, testContents.length);
      
      // 验证缓存访问
      for (final content in testContents) {
        final cachedCount = reviewCountCache[content.id] ?? 0;
        final actualCount = testReviews.where((r) => r.contentId == content.id).length;
        expect(cachedCount, actualCount);
      }
    });

    test('should handle text alignment requirements', () {
      // 验证文本对齐需求
      final topics = testTopics;
      
      for (final topic in topics) {
        // 验证标题文本特征
        expect(topic.title.isNotEmpty, true);
        expect(topic.title.trim(), topic.title); // 无前后空格
        
        // 验证标题适合左对齐显示
        expect(topic.title.startsWith(' '), false);
        expect(topic.title.endsWith(' '), false);
      }
    });

    test('should support UI layout requirements', () {
      // 验证UI布局需求
      
      // 1. 标题换行需求
      final longTitle = testTopics[1].title;
      expect(longTitle.length > 50, true); // 需要换行的长标题
      
      // 2. 评论数量显示需求
      final reviewCounts = testReviews.fold<Map<int, int>>({}, (map, review) {
        map[review.contentId] = (map[review.contentId] ?? 0) + 1;
        return map;
      });
      
      // 验证评论数量范围
      expect(reviewCounts.values.any((count) => count == 0), false); // 实际有评论的内容
      expect(reviewCounts.values.any((count) => count > 0), true); // 有评论的内容
      expect(reviewCounts.values.any((count) => count >= 5), true); // 多评论的内容
      
      // 3. 数据显示格式
      for (final count in reviewCounts.values) {
        expect('$count'.isNotEmpty, true);
        expect(int.tryParse('$count'), isNotNull);
      }
    });

    test('should validate content display data completeness', () {
      // 验证内容显示数据的完整性
      for (final content in testContents) {
        // 基本内容数据
        expect(content.id, isNotNull);
        expect(content.picture.isNotEmpty, true);
        expect(content.description.isNotEmpty, true);
        expect(content.userId, greaterThan(0));
        expect(content.topicId, greaterThan(0));
        
        // 发布时间
        expect(content.publishedAt, isNotNull);
        expect(content.publishedAt!.isBefore(DateTime.now()), true);
        
        // 关联的主题
        final topic = testTopics.where((t) => t.id == content.topicId).firstOrNull;
        expect(topic, isNotNull);
        
        // 评论数量
        final reviewCount = testReviews.where((r) => r.contentId == content.id).length;
        expect(reviewCount, greaterThanOrEqualTo(0));
      }
    });
  });
}
